<!DOCTYPE html>
<html lang="en-us">
  <head>

    <meta http-equiv="content-type" content="text/html; charset=utf-8">
    
<meta charset="UTF-8">
<title>Navigating This Book | Elasticsearch: The Definitive Guide [2.x] | Elastic</title>
<link rel="home" href="index.html" title="Elasticsearch: The Definitive Guide [2.x]">
<link rel="up" href="_preface.html" title="Preface">
<link rel="prev" href="_how_to_read_this_book.html" title="How to Read This Book">
<link rel="next" href="_online_resources.html" title="Online Resources">
<meta name="DC.type" content="Learn/Docs/Legacy/Elasticsearch/Definitive Guide/2.x">
<meta name="DC.subject" content="Elasticsearch">
<meta name="DC.identifier" content="2.x">
<meta name="robots" content="noindex,nofollow">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://cdn.optimizely.com/js/18132920325.js"></script>
    <link rel="apple-touch-icon" sizes="57x57" href="/apple-icon-57x57.png">
    <link rel="apple-touch-icon" sizes="60x60" href="/apple-icon-60x60.png">
    <link rel="apple-touch-icon" sizes="72x72" href="/apple-icon-72x72.png">
    <link rel="apple-touch-icon" sizes="76x76" href="/apple-icon-76x76.png">
    <link rel="apple-touch-icon" sizes="114x114" href="/apple-icon-114x114.png">
    <link rel="apple-touch-icon" sizes="120x120" href="/apple-icon-120x120.png">
    <link rel="apple-touch-icon" sizes="144x144" href="/apple-icon-144x144.png">
    <link rel="apple-touch-icon" sizes="152x152" href="/apple-icon-152x152.png">
    <link rel="apple-touch-icon" sizes="180x180" href="/apple-icon-180x180.png">
    <link rel="icon" type="image/png" href="/favicon-32x32.png" sizes="32x32">
    <link rel="icon" type="image/png" href="/android-chrome-192x192.png" sizes="192x192">
    <link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96">
    <link rel="icon" type="image/png" href="/favicon-16x16.png" sizes="16x16">
    <link rel="manifest" href="/manifest.json">
    <meta name="apple-mobile-web-app-title" content="Elastic">
    <meta name="application-name" content="Elastic">
    <meta name="msapplication-TileColor" content="#ffffff">
    <meta name="msapplication-TileImage" content="/mstile-144x144.png">
    <meta name="theme-color" content="#ffffff">
    <meta name="naver-site-verification" content="936882c1853b701b3cef3721758d80535413dbfd">
    <meta name="yandex-verification" content="d8a47e95d0972434">
    <meta name="localized" content="true">
    <meta name="st:robots" content="follow,index">
    <meta property="og:image" content="https://www.elastic.co/static/images/elastic-logo-200.png">
    <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
    <link rel="icon" href="/favicon.ico" type="image/x-icon">
    <link rel="apple-touch-icon-precomposed" sizes="64x64" href="/favicon_64x64_16bit.png">
    <link rel="apple-touch-icon-precomposed" sizes="32x32" href="/favicon_32x32.png">
    <link rel="apple-touch-icon-precomposed" sizes="16x16" href="/favicon_16x16.png">
    <!-- Give IE8 a fighting chance -->
    <!--[if lt IE 9]>
    <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
    <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
    <link rel="stylesheet" type="text/css" href="/guide/static/styles.css">
  </head>

  <!--© 2015-2021 Elasticsearch B.V. Copying, publishing and/or distributing without written permission is strictly prohibited.-->

  <body>
    <!-- Google Tag Manager -->
    <script>dataLayer = [];</script><noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-58RLH5" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
    <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-58RLH5');</script>
    <!-- End Google Tag Manager -->

    <!-- Global site tag (gtag.js) - Google Analytics -->
    <script async src="https://www.googletagmanager.com/gtag/js?id=UA-12395217-16"></script>
    <script>
      window.dataLayer = window.dataLayer || [];
      function gtag(){dataLayer.push(arguments);}
      gtag('js', new Date());
      gtag('config', 'UA-12395217-16');
    </script>

    <!--BEGIN QUALTRICS WEBSITE FEEDBACK SNIPPET-->
    <script type="text/javascript">
      (function(){var g=function(e,h,f,g){
      this.get=function(a){for(var a=a+"=",c=document.cookie.split(";"),b=0,e=c.length;b<e;b++){for(var d=c[b];" "==d.charAt(0);)d=d.substring(1,d.length);if(0==d.indexOf(a))return d.substring(a.length,d.length)}return null};
      this.set=function(a,c){var b="",b=new Date;b.setTime(b.getTime()+6048E5);b="; expires="+b.toGMTString();document.cookie=a+"="+c+b+"; path=/; "};
      this.check=function(){var a=this.get(f);if(a)a=a.split(":");else if(100!=e)"v"==h&&(e=Math.random()>=e/100?0:100),a=[h,e,0],this.set(f,a.join(":"));else return!0;var c=a[1];if(100==c)return!0;switch(a[0]){case "v":return!1;case "r":return c=a[2]%Math.floor(100/c),a[2]++,this.set(f,a.join(":")),!c}return!0};
      this.go=function(){if(this.check()){var a=document.createElement("script");a.type="text/javascript";a.src=g;document.body&&document.body.appendChild(a)}};
      this.start=function(){var a=this;window.addEventListener?window.addEventListener("load",function(){a.go()},!1):window.attachEvent&&window.attachEvent("onload",function(){a.go()})}};
      try{(new g(100,"r","QSI_S_ZN_emkP0oSe9Qrn7kF","https://znemkp0ose9qrn7kf-elastic.siteintercept.qualtrics.com/WRSiteInterceptEngine/?Q_ZID=ZN_emkP0oSe9Qrn7kF")).start()}catch(i){}})();
    </script><div id="ZN_emkP0oSe9Qrn7kF"><!--DO NOT REMOVE-CONTENTS PLACED HERE--></div>
    <!--END WEBSITE FEEDBACK SNIPPET-->

    <div id="elastic-nav" style="display:none;"></div>
    <script src="https://www.elastic.co/elastic-nav.js"></script>

    <!-- Subnav -->
    <div>
      <div>
        <div class="tertiary-nav d-none d-md-block">
          <div class="container">
            <div class="p-t-b-15 d-flex justify-content-between nav-container">
              <div class="breadcrum-wrapper"><span><a href="/guide/" style="font-size: 14px; font-weight: 600; color: #000;">Docs</a></span></div>
            </div>
          </div>
        </div>
      </div>
    </div>

    <div class="main-container">
      <section id="content">
        <div class="content-wrapper">

          <section id="guide" lang="en">
            <div class="container">
              <div class="row">
                <div class="col-xs-12 col-sm-8 col-md-8 guide-section">
                  <!-- start body -->
                  <div class="page_header">
<p>
  <strong>WARNING</strong>: The 2.x versions of Elasticsearch have passed their
  <a href="https://www.elastic.co/support/eol">EOL dates</a>. If you are running
  a 2.x version, we strongly advise you to upgrade.
</p>
<p>
  This documentation is no longer maintained and may be removed. For the latest
  information, see the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html">current
  Elasticsearch documentation</a>.
</p>
</div>
<div id="content">
<div class="breadcrumbs">
<span class="breadcrumb-link"><a href="index.html">Elasticsearch: The Definitive Guide [2.x]</a></span>
»
<span class="breadcrumb-link"><a href="_preface.html">Preface</a></span>
»
<span class="breadcrumb-node">Navigating This Book</span>
</div>
<div class="navheader">
<span class="prev">
<a href="_how_to_read_this_book.html">« How to Read This Book</a>
</span>
<span class="next">
<a href="_online_resources.html">Online Resources »</a>
</span>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h2 class="title">
<a id="_navigating_this_book"></a>Navigating This Book<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch-definitive-guide/edit/2.x/Preface.asciidoc">edit</a>
</h2>
</div></div></div>
<p>This book is divided into seven parts:</p>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Chapters <a class="xref" href="intro.html" title="You Know, for Search…​"><em>You Know, for Search…​</em></a> through <a class="xref" href="inside-a-shard.html" title="Inside a Shard"><em>Inside a Shard</em></a> provide an introduction to Elasticsearch. They
explain how to get your data in and out of Elasticsearch, how Elasticsearch
interprets the data in your documents, how basic search works, and how to
manage indices. By the end of this section, you will already be able to
integrate your application with Elasticsearch. Chapters
<a class="xref" href="distributed-cluster.html" title="Life Inside a Cluster"><em>Life Inside a Cluster</em></a>, <a class="xref" href="distributed-docs.html" title="Distributed Document Store"><em>Distributed Document Store</em></a>, <a class="xref" href="distributed-search.html" title="Distributed Search Execution"><em>Distributed Search Execution</em></a>, and <a class="xref" href="inside-a-shard.html" title="Inside a Shard"><em>Inside a Shard</em></a>
are supplemental chapters that provide more insight into the distributed
processes at work, but are not required reading.
</li>
<li class="listitem">
Chapters <a class="xref" href="structured-search.html" title="Structured Search"><em>Structured Search</em></a> through <a class="xref" href="controlling-relevance.html" title="Controlling Relevance"><em>Controlling Relevance</em></a>
offer a deep dive into search—​how to index and
query your data to allow  you to take advantage of more-advanced concepts
such as word proximity, and partial matching. You will understand how
relevance works and how to control it to ensure that the best results are
on the first page.
</li>
<li class="listitem">
Chapters <a class="xref" href="language-intro.html" title="Getting Started with Languages"><em>Getting Started with Languages</em></a> through <a class="xref" href="fuzzy-matching.html" title="Typoes and Mispelings"><em>Typoes and Mispelings</em></a>
tackle the thorny subject of dealing with human
language through effective use of analyzers and queries. We start with
an easy approach to language analysis before diving into the complexities
of language, alphabets, and sorting. We cover stemming, stopwords, synonyms,
and fuzzy matching.
</li>
<li class="listitem">
Chapters <a class="xref" href="aggs-high-level.html" title="High-Level Concepts"><em>High-Level Concepts</em></a> through <a class="xref" href="docvalues-and-fielddata.html" title="Doc Values and Fielddata"><em>Doc Values and Fielddata</em></a>
discuss aggregations and analytics—​ways to summarize and group your data to show overall trends.
</li>
<li class="listitem">
Chapters <a class="xref" href="geopoints.html" title="Geo Points"><em>Geo Points</em></a> through <a class="xref" href="geo-shapes.html" title="Geo Shapes"><em>Geo Shapes</em></a>
present the two approaches to geolocation
supported by Elasticsearch: lat/lon geo-points, and complex geo-shapes.
</li>
<li class="listitem">
Chapters <a class="xref" href="relations.html" title="Handling Relationships"><em>Handling Relationships</em></a> through <a class="xref" href="scale.html" title="Designing for Scale"><em>Designing for Scale</em></a>
talk about how to model your data to work
most efficiently with Elasticsearch.  Representing relationships
between entities is not as easy in a search engine as it is in
a relational database, which has been designed for that purpose.
These chapters also explain how to suit your index design to
match the flow of data through your system.
</li>
<li class="listitem">
Finally, Chapters <a class="xref" href="cluster-admin.html" title="Monitoring"><em>Monitoring</em></a> through <a class="xref" href="post_deploy.html" title="Post-Deployment"><em>Post-Deployment</em></a>
discuss moving to production: the important configurations, what to monitor, and how to diagnose and prevent problems.
</li>
</ul>
</div>
</div>
<div class="navfooter">
<span class="prev">
<a href="_how_to_read_this_book.html">« How to Read This Book</a>
</span>
<span class="next">
<a href="_online_resources.html">Online Resources »</a>
</span>
</div>
</div>

                  <!-- end body -->
                </div>
                <div class="col-xs-12 col-sm-4 col-md-4" id="right_col">
                  <div id="rtpcontainer" style="display: block;">
                    <div class="mktg-promo">
                      <h3>Most Popular</h3>
                      <ul class="icons">
                        <li class="icon-elasticsearch-white"><a href="https://www.elastic.co/webinars/getting-started-elasticsearch?baymax=default&amp;elektra=docs&amp;storm=top-video">Get Started with Elasticsearch: Video</a></li>
                        <li class="icon-kibana-white"><a href="https://www.elastic.co/webinars/getting-started-kibana?baymax=default&amp;elektra=docs&amp;storm=top-video">Intro to Kibana: Video</a></li>
                        <li class="icon-logstash-white"><a href="https://www.elastic.co/webinars/introduction-elk-stack?baymax=default&amp;elektra=docs&amp;storm=top-video">ELK for Logs &amp; Metrics: Video</a></li>
                      </ul>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </section>

        </div>


<div id="elastic-footer"></div>
<script src="https://www.elastic.co/elastic-footer.js"></script>
<!-- Footer Section end-->

      </section>
    </div>

<script src="/guide/static/jquery.js"></script>
<script type="text/javascript" src="/guide/static/docs.js"></script>
<script type="text/javascript">
  window.initial_state = {}</script>
  </body>
</html>
